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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/common/android/trace_event_binding.h"
#include <jni.h>
#include <set>
#include "base/debug/trace_event.h"
#include "base/lazy_instance.h"
#include "jni/TraceEvent_jni.h"
namespace {
const char kJavaCategory[] = "Java";
// Boilerplate for safely converting Java data to TRACE_EVENT data.
class TraceEventDataConverter {
public:
TraceEventDataConverter(JNIEnv* env,
jstring jname,
jstring jarg)
: env_(env),
jname_(jname),
jarg_(jarg),
name_(env->GetStringUTFChars(jname, NULL)),
arg_(jarg ? env->GetStringUTFChars(jarg, NULL) : NULL) {
}
~TraceEventDataConverter() {
env_->ReleaseStringUTFChars(jname_, name_);
if (jarg_)
env_->ReleaseStringUTFChars(jarg_, arg_);
}
// Return saves values to pass to TRACE_EVENT macros.
const char* name() { return name_; }
const char* arg_name() { return arg_ ? "arg" : NULL; }
const char* arg() { return arg_; }
private:
JNIEnv* env_;
jstring jname_;
jstring jarg_;
const char* name_;
const char* arg_;
DISALLOW_COPY_AND_ASSIGN(TraceEventDataConverter);
};
} // namespace
static jboolean TraceEnabled(JNIEnv* env, jclass clazz) {
return base::debug::TraceLog::GetInstance()->IsEnabled();
}
static void Instant(JNIEnv* env, jclass clazz,
jstring jname, jstring jarg) {
TraceEventDataConverter converter(env, jname, jarg);
if (converter.arg()) {
TRACE_EVENT_COPY_INSTANT1(kJavaCategory, converter.name(),
converter.arg_name(), converter.arg());
} else {
TRACE_EVENT_COPY_INSTANT0(kJavaCategory, converter.name());
}
}
static void Begin(JNIEnv* env, jclass clazz,
jstring jname, jstring jarg) {
TraceEventDataConverter converter(env, jname, jarg);
if (converter.arg()) {
TRACE_EVENT_COPY_BEGIN1(kJavaCategory, converter.name(),
converter.arg_name(), converter.arg());
} else {
TRACE_EVENT_COPY_BEGIN0(kJavaCategory, converter.name());
}
}
static void End(JNIEnv* env, jclass clazz,
jstring jname, jstring jarg) {
TraceEventDataConverter converter(env, jname, jarg);
if (converter.arg()) {
TRACE_EVENT_COPY_END1(kJavaCategory, converter.name(),
converter.arg_name(), converter.arg());
} else {
TRACE_EVENT_COPY_END0(kJavaCategory, converter.name());
}
}
bool RegisterTraceEvent(JNIEnv* env) {
return RegisterNativesImpl(env);
}
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